eBay is pretty careful about how they word the "1 Million a month" affiliates - I believe the time periods where that was done was before they stopped alowing forced clicks and massively overhauled the way they count traffic. People were buying massive pop-under traffic that set their cookie. I don't know what the top aff makes now, but if it was over a million they would be promoting it. Now they say " Several eBay affiliates earn over $100,000 every month", which I believe - with a conservative estimate of 'several'.

That said, it's a decent program and great for cross-selling many different products.

Spider ebay auctions or use the API, cloak the pages, redirect traffic via an affiliate link to ebay

Lifespan of these types of sites are very short these days, with or without a redirect. Many of the fixed price antique mall types are on a quest to kill any eBay affiliates in the serps. Expect to be spam reported to hell and back.

The biggest problem is that eBay itself will jack your cookie on the person's next visit to eBay from the serps or type-ins.